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INTEGRATED CIRCUIT HAVING RE-CONFIGURABLE BALUN CIRCUIT AND METHOD THEREFOR

  • US 20080278258A1
  • Filed: 05/08/2007
  • Published: 11/13/2008
  • Est. Priority Date: 05/08/2007
  • Status: Abandoned Application
First Claim
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1. A circuit comprising:

  • a balun transformer having first and second windings, the first winding having first and second terminals and the second winding having first and second terminals;

    a first variable capacitor having a first plate electrode coupled to the first terminal of the first winding, and a second plate electrode coupled to the second terminal of first winding, the first variable capacitor being tunable between first and second capacitance values, the first capacitance value for allowing the circuit to operate in a first frequency band and the second capacitance value for allowing the circuit to operate in a second frequency band, wherein the first frequency band is different from the second frequency band; and

    a second variable capacitor having a first plate electrode coupled to the first terminal of the second winding, and a second plate electrode coupled to the second terminal of the second winding, the second variable capacitor being tunable between third and fourth capacitance values, the third capacitance value for allowing the circuit to operate in the first frequency band and a fourth capacitance value for allowing the circuit to operate in the second frequency band.

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